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A&P test #1 > Chapter 5 > Flashcards

Chapter 5 Flashcards

1
Q

_______ muscle is the voluntary muscle attached to bones.
a. Smooth
b. Skeletal
c. Cardiac
d. Active

A

b. Skeletal

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2
Q

About _______ skeletal muscles, working together, allow us to carry on
our daily activities and move effectively through our world.
a. 600
b. 300
c. 100
d. 900

A

a. 600

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3
Q

Each skeletal muscle is an organ made up of hundreds, sometimes
thousands, of muscle cells, referred to as _______.
a. fascicles
b. sarcomeres
c. muscle fibers
d. muscle filaments

A

c. muscle fibers

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4
Q

Each muscle is surrounded by a covering of connective tissue called
_______.
a. fibers
b. epimysium
c. fascicles
d. perimysium

A

b. epimysium

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5
Q

Extensions of epimysium form tough cords of connective tissue, the
_______, that anchor muscle to bones.
a. ligaments
b. fibers
c. bone fragments
d. tendons

A

d. tendons

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6
Q

Thin filaments, called _______ filaments, consist of the protein actin.
a. myosin
b. fascicle
c. actin
d. tendon

A

c. actin

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7
Q

A _______ is a nerve that controls muscle contractions.
a. motor nerve
b. sensory nerve
c. nucleus
d. contractile

A

a. motor nerve

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8
Q

_______ are represented by the letters A, H, and I.
a. Sarcomeres
b. Muscle bands
c. Myofibrils
d. Motor nerves

A

b. Muscle bands

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9
Q

Excess acetylcholine is broken down by an enzyme called _______.
a. ATP
b. actin
c. myosin
d. acetylcholinesterase

A

d. acetylcholinesterase

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10
Q

The depletion of ATP results in weaker contractions and _______.
a. oxygen debt
b. decreased muscle tone
c. bone weakness
d. muscle fatigue

A

d. muscle fatigue

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11
Q

Oxygen debt is paid back during the period of _______.
a. REM sleep
b. slow breathing
c. aerobic exercise
d. rapid breathing

A

d. rapid breathing

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12
Q
  1. _______ contraction occurs when muscles shorten and thicken.
    a. Isometric
    b. Motor
    c. Unconscious
    d. Isotonic
A

d. Isotonic

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13
Q

The attachment of the muscle to the less movable bone is called its
_______.
a. origin
b. insertion
c. antagonist
d. synergist

A

a. origin

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14
Q

The muscle that contracts to produce a particular action is known as the
_______.
a. insertion
b. origin
c. agonist
d. antagonist

A

c. agonist

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15
Q

The _______ muscle elevates the upper corners of the mouth.
a. orbicularis oculi
b. frontalis
c. zygomatic
d. masseter

A

c. zygomatic

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16
Q

The _______ muscle flexes the trunk and compresses the abdominal
contents.
a. rectus abdominis
b. transverse abdominis
c. external oblique
d. diaphragm

A

a. rectus abdominis

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17
Q

The immediate source of energy for muscle contraction is _______.
a. lactic acid
b. ATP
c. glycogen
d. oxygen

A

b. ATP

18
Q

A muscle that extends the elbow is the _______.
a. biceps brachii
b. triceps brachii
c. biceps femoris
d. brachioradialis

A

b. triceps brachii

19
Q

The masseter muscle _______.
a. rotates the arm medially
b. abducts the thigh
c. flexes the knee
d. is important in chewing

A

d. is important in chewing

20
Q

The gastrocnemius muscle _______.
a. rotates the thigh laterally
b. abducts the arm
c. flexes the trunk
d. flexes the knee

A

d. flexes the knee

21
Q

The muscle fibers are arranged in bundles known as _______.
a. tendons
b. endomysium
c. perimysium
d. fascicles

A

d. fascicles

22
Q

In muscle fibers, the _______ has/have many inward extensions that form
a set of transverse tubules.
a. plasma membrane
b. myofibrils
c. perimysium
d. fascicles

A

a. plasma membrane

23
Q

Each muscle fiber is almost filled with thread-like structures called
_______.
a. fascicles
b. perimysium
c. myofibrils
d. actin

A

c. myofibrils

24
Q

Myofibrils are composed of smaller structures called _______ that are
made of protein threads.
a. filaments
b. perimysium
c. sarcomeres
d. fibers

A

a. filaments

25
Q

The overlapping of myosin and actin filaments _______.
a. produces a pattern of bands or striations
b. stimulates the release of calcium
c. releases creatine phosphate
d. releases acetylcholine

A

a. produces a pattern of bands or striations

26
Q

_______ are the basic units of muscle contraction.
a. Myofibrils
b. Sarcomeres
c. Z lines
d. Muscle fibers

A

b. Sarcomeres

27
Q

A(n) _______ releases the neurotransmitter acetylcholine.
a. synaptic cleft
b. neuromuscular junction
c. motor neuron
d. action potential

A

c. motor neuron

28
Q

The immediate source of energy for muscle contractions comes from
_______.
a. lactic acid
b. oxygen
c. glucose
d. ATP

A

d. ATP

29
Q

A waste product called _______ is produced during the anaerobic
metabolism of glucose.
a. actin
b. lactic acid
c. creatine
d. acetylcholine

A

b. lactic acid

30
Q

Rapid breathing pays back the _______ debt by breaking down lactic acid.
a. creatine
b. glycogen
c. oxygen
d. glucose

A

c. oxygen

31
Q

Even when we are not moving, our muscles are in a state of partial
contraction that gives us _______.
a. isotonic contraction
b. isometric contraction
c. muscle tone
d. muscle fatigue

A

c. muscle tone

32
Q

_______ contraction occurs when the muscle length does not appreciably
change but muscle tension increases.
a. Isotonic
b. Motor
c. Isometric
d. Hypertonic

A

c. Isometric

33
Q

The attachment of the muscle to the more movable bone is its _______
a. insertion
b. origin
c. antagonist
d. synergist

A

a. insertion

34
Q

The biceps (brachii) and triceps work _______ to one another.
a. agonistically
b. antagonistically
c. synergistically
d. isotonically

A

b. antagonistically

35
Q

Synergists are muscles that _______.
a. relax when the agonist is contracted
b. are responsible for muscle tone
c. stabilize joints
d. contract isometrically

A

c. stabilize joints

36
Q

The _______ muscle adducts the scapula and rotates it and draws the
shoulders upward.
a. sternocleidomastoid
b. external oblique
c. pectoralis minor
d. trapezius

A

d. trapezius

37
Q

The _______ muscle extends and rotates the thigh laterally and tilts the
pelvis.
a. iliacus
b. triceps
c. gluteus maximus
d. gracilis

A

c. gluteus maximus

38
Q

The external intercostals are important in _______.
a. chewing
b. breathing
c. isometric exercise
d. turning the head

A

b. breathing

39
Q

The biceps brachii _______.
a. flexes the elbow
b. rotates the arm medially
c. flexes the trunk
d. flexes the knee

A

a. flexes the elbow

40
Q

The gluteus maximus _______.
a. extends the leg at the knee
b. plantar flexes the foot
c. flexes the trunk
d. extends and rotates the thigh laterally

A

d. extends and rotates the thigh laterally

A&P test #1 (8 decks)

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